KR20140057077A - Apparatus and method of transmitting user equipment capability information in multiple component carrier system - Google Patents

Abstract

The present invention relates to an apparatus and a method of transmitting the capability information of a terminal in a multiple component carrier system. According to the present specification, disclosed is a method which includes a step of receiving a terminal capability inquiry message required for the capability of a terminal to a base station, a step of comprising band combination parameter information which represents the combination of bands which support the terminal among the bands; and a step of comprising the terminal capability information which includes the band combination parameter information, and a step of transmitting the terminal capability information to the base station. Protocol of signaling the multiple time arrangement capability of the terminal in the multiple component carrier system can be clearly defined.

Description

[0001] APPARATUS AND METHOD OF TRANSMITTING USER EQUIPMENT CAPABILITY INFORMATION IN MULTIPLE COMPONENT CARRIER SYSTEM [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to wireless communication, and more particularly, to an apparatus and method for transmitting performance information of a terminal in a multi-element carrier system.

In the wireless communication system, although a bandwidth between an uplink and a downlink is set to be different from each other, only one carrier is mainly considered. Also in the 3rd Generation Partnership Project (3GPP) LTE (long term evolution), the number of carriers constituting the uplink and the downlink is one based on a single carrier, and the bandwidths of the uplink and the downlink are symmetrical to each other. In this single carrier system, a random access procedure is performed using one carrier. However, with the recent introduction of a multiple component carrier system, a random access procedure can be implemented through a plurality of component carriers.

A multi-element carrier system refers to a wireless communication system capable of supporting carrier aggregation. Carrier aggregation is a technique for efficiently using a fragmented small band, which is the same as using a logically large band by bundling a plurality of physically continuous or non-continuous bands in the frequency domain In order to make sure that the

However, as a multi-element carrier system is introduced, a procedure for individually securing uplink synchronization of each element carrier is required. This is because the delay of the signal for each element carrier can be changed according to the frequency band characteristic. If the uplink synchronization for each element carrier is not secured, the base station can not correctly receive the uplink signal transmitted by the terminal. In order to secure uplink synchronization for each elementary carrier, a random access procedure can be used. Based on the random access procedure, the terminal can obtain a timing alignment value to be applied to each element carrier wave. The problem is that although the base station calculates the time alignment value for each element carrier and provides it to the terminal, there may be a case where the terminal can not apply a plurality of time alignment values to the actual communication due to the performance limitation of the terminal. That is, a terminal having a capability of securing uplink synchronization for each element carrier on the hardware structure of the terminal can be distinguished as a terminal not having the capability.

The base station must know whether or not the UE supports uplink synchronization for a plurality of element carriers, and a protocol for determining the uplink synchronization between the UE and the base station should be determined.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an apparatus and method for transmitting performance information of a UE in a multi-carrier system.

Another aspect of the present invention is to provide an apparatus and method for supporting multiple uplink allocation for each band combination that can be supported by a terminal when multiple uplink synchronization is established.

Another aspect of the present invention is to provide a method for transmitting information on whether or not a terminal supports multi-time alignment through performance information of a terminal.

It is another object of the present invention to provide an apparatus and method for constructing information indicating whether or not multi-time alignment is supported.

According to an aspect of the present invention, there is provided a method for transmitting terminal capability information by a terminal in a multi-component carrier system. The method includes receiving a UE performance query message requesting performance of the UE from a BS, configuring band combination parameter information indicating a combination of bands supported by the UE among a plurality of bands, Band combination parameter information, and transmitting the terminal capability information to the base station.

Herein, the band combination parameter information includes a first information field indicating that the UE supports time alignment of uplink component carriers belonging to different bands in the combination, and a second information field indicating that the UE supports uplink components belonging to a single band in the combination And optionally a second information field indicating that the element carriers support time alignment of the element carriers.

If the second information field is included in the band combination parameter information, the terminal supports time alignment of uplink component carriers belonging to the single band. Otherwise, the terminal allocates uplink component carriers belonging to the single band Lt; / RTI > may not support time alignment for < RTI ID = 0.0 >

Also, if a second information field is included in the band combination parameter information, for every single band in the combination, the terminal supports time alignment of uplink element carriers belonging to each single band, otherwise, For all single bands, the terminal may not support time alignment of uplink element carriers belonging to each single band.

On the other hand, the second information field is a bit string for mapping each bit and a single band at a ratio of 1: 1. If the value of a specific bit is 1, the terminal transmits an uplink component The time alignment of the carrier waves is supported, and if it is 0, the terminal may not support time alignment of uplink element carriers belonging to a single band mapped to the specific bit.

Here, the length of the bit string may be equal to the maximum number of bands that the terminal can simultaneously support.

According to another aspect of the present invention, there is provided a terminal for transmitting terminal capability information in a multi-element carrier system. Wherein the terminal comprises a receiver for receiving a UE performance query message requesting performance of the terminal from a base station, band composition parameter information indicating a combination of bands supported by the terminal from among a plurality of bands, A time alignment controller for supporting time alignment of at least one uplink component carrier, and a transmitter for transmitting the terminal capability information to the base station.

Here, the message processing unit may include a first information field indicating that the UE supports time alignment of uplink component carriers belonging to different bands in the combination, and a second information field indicating that the UE supports uplink component carriers belonging to a single band in the combination And a second information field indicating that the terminal information supports time alignment of the terminal information.

If the second information field is included in the band combination parameter information, the terminal supports time alignment of uplink component carriers belonging to the single band. Otherwise, the terminal allocates uplink component carriers belonging to the single band Lt; / RTI > may not support time alignment for < RTI ID = 0.0 >

Also, if a second information field is included in the band combination parameter information, for every single band in the combination, the terminal supports time alignment of uplink element carriers belonging to each single band, otherwise, For all single bands, the terminal may not support time alignment of uplink element carriers belonging to each single band.

On the other hand, the second information field is a bit string for mapping each bit and a single band at a ratio of 1: 1. If the value of a specific bit is 1, the terminal transmits an uplink component The time alignment of the carrier waves is supported, and if it is 0, the terminal may not support time alignment of uplink element carriers belonging to a single band mapped to the specific bit.

According to another aspect of the present invention, there is provided a method for receiving terminal capability information by a base station in a multi-element carrier system. The method includes transmitting a terminal performance inquiry message requesting performance of the terminal to the terminal, and receiving the terminal capability information from the terminal as a response to the terminal performance inquiry message.

Herein, the terminal capability information includes band combination parameter information indicating a combination of bands supported by the terminal from among a plurality of bands, and the band combination parameter information includes information on uplink A first information field indicating that the element carrier supports time alignment of the element carriers and a second information field indicating that the terminal supports time alignment of the UL carrier waves belonging to a single band in the combination, .

If the second information field is included in the band combination parameter information, the terminal supports time alignment of uplink component carriers belonging to the single band. Otherwise, the terminal allocates uplink component carriers belonging to the single band Lt; / RTI > may not support time alignment for < RTI ID = 0.0 >

Also, if a second information field is included in the band combination parameter information, for every single band in the combination, the terminal supports time alignment of uplink element carriers belonging to each single band, otherwise, For all single bands, the terminal may not support time alignment of uplink element carriers belonging to each single band.

Meanwhile, the second information field is a bit string for mapping each bit and a single band to 1: 1. When the value of a specific bit is 1, the terminal allocates time alignment of uplink element carriers belonging to a single band mapped to the specific bit 0, the terminal may not support time alignment of uplink element carriers belonging to a single band mapped to the specific bit.

According to another aspect of the present invention, there is provided a base station for receiving terminal capability information in a multi-element carrier system. The base station includes a transmitter for transmitting a terminal performance inquiry message requesting performance of the terminal to the terminal, a terminal performance information including band combination parameter information indicating a combination of bands supported by the terminal among a plurality of bands, A first information field indicating that the UE supports time alignment of uplink component carriers belonging to different bands in the combination, and a second information field indicating that the UE supports time alignment of uplink component carriers belonging to a single band in the combination And a second information field indicating that the second information field supports the time alignment of the band combination parameter information is included in the band combination parameter information.

If the second information field is included in the band combination parameter information, the base station supports temporal alignment of uplink element carriers belonging to the single band to the terminal, and if not, And may further include a time alignment controller that does not support time alignment for the uplink element carriers belonging thereto.

In addition, the base station supports time alignment of uplink component carriers belonging to each single band, for every single band in the combination, if the second information field is included in the band combination parameter information, For each single band in the single band, the time alignment controller does not support time alignment of uplink element carriers belonging to each single band.

Also, the second information field is a bit string for mapping each bit and a single band to 1: 1, and if the value of a specific bit is 1, the BS determines the time of uplink element carriers belonging to a single band mapped to the specific bit And does not support time alignment of uplink element carriers belonging to a single band that is mapped to the specific bit when the number of bits is 0, and the time alignment controller does not support time alignment of uplink element carriers belonging to a single band mapped to the specific bit.

In a multi-carrier system, when the band-to-band carrier aggregation or the in-band carrier aggregation is performed, the protocol for signaling the multi-time sorting performance of the terminal becomes clear.

1 shows a wireless communication system to which the present invention is applied.
FIG. 2 shows an example of a protocol structure for supporting a multi-element carrier wave to which the present invention is applied.
FIG. 3 shows an example of a frame structure for a multi-component carrier wave operation to which the present invention is applied.
FIG. 4 illustrates a linkage between a downlink component carrier and an uplink component carrier in a multi-component carrier system to which the present invention is applied.
5 is a flowchart illustrating a signaling procedure for multi-time alignment performance according to an exemplary embodiment of the present invention.
6 is a structural diagram of a terminal supporting multi-time alignment according to an exemplary embodiment of the present invention.
FIG. 7 is a structural diagram of a terminal supporting multi-time alignment according to another example of the present invention.
FIG. 8 is a structural diagram of a terminal supporting multi-time alignment according to another example of the present invention.
9 is a flowchart illustrating a procedure for obtaining a multi-time alignment value according to an exemplary embodiment of the present invention.
10 is a flowchart illustrating a method for transmitting terminal capability information according to an exemplary embodiment of the present invention.
11 is a flowchart illustrating a method of receiving a terminal capability information by a base station according to an exemplary embodiment of the present invention.
12 is a block diagram illustrating a terminal and a base station transmitting and receiving terminal capability information according to an exemplary embodiment of the present invention.

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. It should be noted that, in adding reference numerals to the constituent elements of the drawings, the same constituent elements are denoted by the same reference symbols as possible even if they are shown in different drawings. In the following description of the embodiments of the present invention, a detailed description of known configurations or functions will be omitted if it is determined that the gist of the present specification may be obscured.

In addition, the present invention will be described with respect to a wireless communication network. The work performed in the wireless communication network may be performed in a process of controlling a network and transmitting data by a system (e.g., a base station) Work can be done at a terminal connected to the network.

1 shows a wireless communication system to which the present invention is applied.

Referring to FIG. 1, a wireless communication system 10 is widely deployed to provide various communication services such as voice, packet data, and the like. The wireless communication system 10 includes at least one base station 11 (BS). Each base station 11 provides communication services to specific cells (15a, 15b, 15c). The cell may again be divided into multiple regions (referred to as sectors).

A user equipment (UE) 12 may be fixed or mobile and may be a mobile station (MS), a mobile terminal (UT), a subscriber station (SS), a wireless device, (personal digital assistant), a wireless modem, a handheld device, and the like. The base station 11 may be called by other terms such as an evolved-NodeB (eNB), a base transceiver system (BTS), an access point, a femto base station, a home node B, . The cell should be interpreted in a generic sense to indicate a partial area covered by the base station 11 and is meant to cover various coverage areas such as a megacell, a macro cell, a microcell, a picocell, and a femtocell.

Hereinafter, downlink refers to communication from the base station 11 to the terminal 12, and uplink refers to communication from the terminal 12 to the base station 11. In the downlink, the transmitter may be part of the base station 11, and the receiver may be part of the terminal 12. In the uplink, the transmitter may be part of the terminal 12, and the receiver may be part of the base station 11. There are no restrictions on multiple access schemes applied to wireless communication systems. (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single Carrier-FDMA , OFDM-CDMA, and the like. A TDD (Time Division Duplex) scheme in which uplink and downlink transmissions are transmitted using different time periods, or an FDD (Frequency Division Duplex) scheme in which they are transmitted using different frequencies can be used.

A Carrier Aggregation (CA) supports a plurality of carriers and is also referred to as spectrum aggregation or bandwidth aggregation. Carrier aggregation is a technique for efficiently using a fragmented small band. It is a technique in which a plurality of physically continuous or non-continuous bands in the frequency domain are combined to use a logically large band, . An individual unit carrier tied by carrier aggregation is referred to as a component carrier (CC). Each element carrier is defined as the bandwidth and center frequency. Carrier aggregation is introduced to support increased throughput, prevent cost increase due to the introduction of wideband radio frequency (RF) devices, and ensure compatibility with existing systems. For example, if five elementary carriers are allocated as the granularity of a carrier unit having a bandwidth of 20 MHz, it can support a bandwidth of up to 100 MHz.

Carrier aggregation can be divided into contiguous carrier aggregation between successive element carriers in the frequency domain and non-contiguous carrier aggregation between discontinuous element carriers. The number of carriers aggregated between the downlink and the uplink may be set differently. The case where the number of downlink element carriers is equal to the number of uplink element carriers is referred to as symmetric aggregation and the case where the number of downlink element carriers is different is referred to as asymmetric aggregation.

The size (i.e. bandwidth) of the element carriers may be different. For example, if five element carriers are used for a 70 MHz band configuration, then 5 MHz element carrier (carrier # 0) + 20 MHz element carrier (carrier # 1) + 20 MHz element carrier (carrier # 2) + 20 MHz element carrier (carrier # 3) + 5 MHz element carrier (carrier # 4).

Hereinafter, a multiple component carrier system refers to a system including a terminal supporting a carrier aggregation and a base station. In a multi-element carrier system, adjacent carrier aggregation and / or non-adjacent carrier aggregation may be used, and either symmetric aggregation or asymmetric aggregation may be used.

FIG. 2 shows an example of a protocol structure for supporting a multi-element carrier wave to which the present invention is applied.

Referring to FIG. 2, a common medium access control (MAC) entity 210 manages a physical layer 220 using a plurality of carriers. The MAC management message transmitted on a specific carrier may be applied to other carriers. That is, the MAC management message is a message capable of controlling other carriers including the specific carrier. The physical layer 220 may operate as a time division duplex (TDD) and / or a frequency division duplex (FDD).

There are some physical channels used in the physical layer 220.

First, as a downlink physical channel, a physical downlink control channel (PDCCH) transmits a paging channel (PCH), a resource allocation of a downlink shared channel (DL-SCH), and Hybrid Automatic Repeat Request (HARQ) It informs. The PDCCH may carry an uplink grant informing the UE of the resource allocation of the uplink transmission. A DL-SCH is mapped to a physical downlink shared channel (PDSCH). The Physical Control Format Indicator Channel (PCFICH) informs the UE of the number of OFDM symbols used for PDCCHs and is transmitted every subframe. The Physical Hybrid ARQ Indicator Channel (PHICH) is a downlink channel, and carries an HARQ ACK / NACK signal which is a response of an uplink transmission.

Next, as an uplink physical channel, a Physical Uplink Control Channel (PUCCH) carries uplink control information such as a HARQ ACK / NACK signal for downlink transmission, a scheduling request, and a CQI. The Physical Uplink Shared Channel (PUSCH) carries an Uplink Shared Channel (UL-SCH). A Physical Random Access Channel (PRACH) carries a random access preamble.

FIG. 3 shows an example of a frame structure for a multi-component carrier wave operation to which the present invention is applied.

Referring to FIG. 3, one frame is composed of 10 subframes. The subframe may be composed of a plurality of OFDM symbols on the time axis and at least one element carrier in the frequency axis. Each element carrier may have its own control channel (e.g., PDCCH). The multi-element carriers may or may not be adjacent to each other. The terminal may support one or more element carriers according to its capabilities.

The element carrier may be divided into a primary component carrier (PCC) and a secondary component carrier (SCC). The terminal may use only one major carrier or use one or more sub-carrier with carrier. A terminal may be allocated a primary carrier and / or secondary carrier from a base station. The element carrier may be represented by a cell or a serving cell. An element carrier not explicitly expressed as a downlink CC or an uplink CC may be configured to include both a downlink component carrier and an uplink component carrier or may include only a downlink component carrier, .

FIG. 4 illustrates a linkage between a downlink component carrier and an uplink component carrier in a multi-component carrier system to which the present invention is applied.

Referring to FIG. 4, the downlink component carriers D1, D2, and D3 are aggregated in the downlink, and the uplink component carriers U1, U2, and U3 are aggregated in the uplink. Where Di is the index of the downlink component carrier and Ui is the index of the uplink component carrier (i = 1, 2, 3). At least one downlink element carrier is a dominant carrier and the remainder is a subordinate element carrier. Similarly, at least one uplink component carrier is a dominant carrier and the remainder is a subindent carrier. For example, D1, U1 are the dominant carriers, and D2, U2, D3, U3 are the subelement carriers. Where the index of the dominant carrier may be set to zero and one of the other natural numbers may be the index of the subindent carrier. The index of the downlink / uplink component carrier may be set equal to the index of an element carrier (or serving cell) including the downlink / uplink component carrier. As another example, only the elementary carrier index or the sub-element carrier index may be set and the uplink / uplink element carrier index included in the corresponding element carrier may not exist.

In the FDD system, the downlink component carrier and the uplink component carrier can be set to be 1: 1. For example, D1 may be set to U1, D2 to U2, and D3 to 1: 1. The UE establishes a connection between the downlink component carriers and the uplink component carriers through the system information transmitted by the logical channel BCCH or the terminal dedicated RRC message transmitted by the DCCH. This connection is referred to as SIB1 (system information block 1) connection or SIB2 (system information block 2) connection. Each connection setting may be cell specific or UE specific. In one example, the primary carrier may be set to cell specific and the secondary carrier may be set to be UE specific.

4 illustrates only a 1: 1 connection setup between the downlink component carrier and the uplink component carrier, but it is needless to say that a 1: n or n: 1 connection setup can also be established. The index of the element carrier does not match the order of the element carriers or the position of the frequency band of the corresponding element carrier.

A primary serving cell is a serving cell that provides security input and NAS mobility information in the RRC establishment or re-establishment state. Depending on the capabilities of the terminal, at least one cell may be configured to form a set of serving cells together with a main serving cell, said at least one cell being referred to as a secondary serving cell.

Therefore, the set of serving cells set for one UE may consist of only one main serving cell, or may consist of one main serving cell and at least one secondary serving cell.

The downlink component carrier corresponding to the main serving cell is referred to as a downlink principal carrier (DL PCC), and the uplink component carrier corresponding to the main serving cell is referred to as an uplink principal carrier (UL PCC). In the downlink, the element carrier corresponding to the secondary serving cell is referred to as a downlink sub-element carrier (DL SCC), and in the uplink, an elementary carrier corresponding to the secondary serving cell is referred to as an uplink sub-element carrier (UL SCC) do. Only one DL serving carrier may correspond to one serving cell, and DL CC and UL CC may correspond to each other.

Therefore, the communication between the terminal and the base station in the carrier system is performed through the DL CC or the UL CC, which is equivalent to the communication between the terminal and the base station through the serving cell. For example, in the method of performing uplink time alignment according to the present invention, the UE performs time alignment in UL CC is equivalent to performing time alignment in the uplink of a main serving cell or a secondary serving cell can see.

On the other hand, the main serving cell and the secondary serving cell have the following characteristics.

First, the main serving cell is used for transmission of the PUCCH. On the other hand, the secondary serving cell can not transmit the PUCCH but may transmit some of the information in the PUCCH through the PUSCH.

Second, the main serving cell is always activated, while the secondary serving cell is a carrier that is activated / deactivated according to certain conditions. The specific condition may be a case where an activation / deactivation indicator of the base station is received or an inactivation timer in the terminal expires. Activation means that the transmission or reception of traffic data is performed or is in a ready state. Deactivation can not transmit or receive traffic data and control information for the traffic data, nor can it perform measurement and reporting to generate downlink channel status information, but it is possible to perform minimum measurement or transmission / reception of minimum information It says. For example, a reference signal received power for the path attenuation calculation and the like and a physical control format indicating direct channel (PCFICH: physical) indicating a region in which control information is transmitted through a downlink of the serving cell, control format indicator channel).

Third, when the main serving cell experiences a Radio Link Failure (RLF), the RRC reset is triggered, but when the serving cell experiences RLF, the RRC reset is not triggered. The radio link failure occurs when the downlink performance is maintained below the threshold for a predetermined time or when the RACH fails more than the threshold number of times.

Fourth, the main serving cell may be changed by a security key change or a handover procedure accompanied by the RACH procedure. However, in the case of a contention resolution (CR) message, only the PDCCH indicating the contention resolution message should be transmitted through the main serving cell, and the contention resolution message may be transmitted through the main serving cell or the secondary serving cell.

Fifth, NAS (non-access stratum) information is received through the main serving cell.

Sixth, the main serving cell always consists of DL PCC and UL PCC in pairs.

Seventh, a different CC may be set as a main serving cell for each terminal.

Eighth, procedures such as reconfiguration, addition and removal of the serving cell can be performed by the radio resource control (RRC) layer. In addition to the new secondary serving cell, RRC signaling may be used to transmit the system information of the dedicated secondary serving cell. For example, the RRC connection reconfiguration procedure may be used with the RRC signaling.

Ninth, the main serving cell transmits PDCCH (e.g., downlink allocation information) assigned to a UE-specific search space set for transmitting control information for a specific UE in a region for transmitting control information Or PDCCH (e.g., system information (e.g., uplink information) allocated to a common search space set for transmitting control information to all terminals in the cell or to a plurality of terminals conforming to a specific condition, SI), a random access response (RAR), and transmit power control (TPC). On the other hand, only the UE-specific search space can be set as the serving cell. That is, since the UE can not confirm the common search space through the secondary serving cell, it can not receive the control information transmitted only through the common search space and the data information indicated by the control information.

A secondary serving cell in which a common search space (CSS) can be defined among the secondary serving cells is called a special secondary serving cell (special SCell). The special-purpose serving cell is always set as a scheduling cell in the case of cross-carrier scheduling. Also, a PUCCH set in the main serving cell may be defined for the special-purpose serving cell.

The PUCCH for the special secondary serving cell may be fixedly set in the special secondary serving cell configuration or the base station may be allocated (configured) or released by RRC signaling (RRC reconfiguration message) upon reconfiguration for that secondary serving cell have.

The PUCCH for the special-purpose serving cell includes ACK / NACK information or CQI (channel quality information) of the secondary serving cells existing in the sTAG, and as mentioned above, can be configured through RRC signaling by the base station have.

In addition, the base station may configure a special secondary serving cell of one of a plurality of secondary serving cells in the sTAG, or may not configure a special secondary serving cell. The reason for not configuring the special-purpose serving cell is that CSS and PUCCH need not be set. For example, if the contention-based random access procedure does not need to proceed in any serving cell, or if it is determined that the capacity of the current serving cell's PUCCH is sufficient and the PUCCH for the additional serving cell is not needed .

The technical idea of the present invention regarding the characteristics of the main serving cell and the secondary serving cell is not necessarily limited to the above description, but is merely an example and may include more examples.

In a wireless communication environment, a propagation delay is propagated while a transmitter propagates and propagates in a receiver. Therefore, even if the transmitter and the receiver both know the time at which the radio wave is propagated correctly, the arrival time of the signal to the receiver is influenced by the transmission / reception period distance and the surrounding propagation environment. If the receiver does not know exactly when the signal transmitted by the transmitter is received, it will receive the distorted signal even if it fails to receive or receive the signal.

Therefore, in the wireless communication system, synchronization between the base station and the terminal must be predetermined in order to receive the information signal regardless of the downlink / uplink. Types of synchronization include frame synchronization, information symbol synchronization, and sampling period synchronization. Sampling period synchronization is the most basic motivation to distinguish physical signals.

The downlink synchronization acquisition is performed in the UE based on the signal of the base station. The base station transmits a mutually agreed specific signal for facilitating downlink synchronization acquisition at the terminal. The terminal must be able to accurately identify the time at which a particular signal sent from the base station is transmitted. In case of downlink, since one base station simultaneously transmits the same synchronization signal to a plurality of terminals, each of the terminals can acquire synchronization independently of each other. Here, the predetermined signals mutually promised are a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a cell reference signal (CRS).

Also, when a plurality of serving cells are configured in the UE, the UE may acquire downlink synchronization independently for each serving cell. If there is a serving cell (ECell) that does not transmit mutually promised specific signals to facilitate downlink synchronization acquisition among the serving cells, a reference for referring to the downlink synchronization for the serving cell The serving cell can be configured in the terminal. The configuration of the reference serving cell may be variable with RRC signaling, may be fixed to the main serving cell, or may be a timing reference cell. The ECell can not be a timing reference cell.

In case of uplink, the base station receives signals transmitted from a plurality of terminals. When the distance between each terminal and the base station is different, signals received by each base station have different transmission delay times. When uplink information is transmitted on the basis of the acquired downlink synchronization, Is received at the corresponding base station. In this case, the base station can not acquire synchronization based on any one of the terminals. Therefore, uplink synchronization acquisition requires a procedure different from downlink.

A random access procedure is performed for uplink synchronization acquisition. During the random access procedure, the UE acquires uplink synchronization based on a timing alignment value transmitted from the base station. The time alignment value may be referred to as a timing advance value in that it has a value to advance the uplink time.

Upon receiving a random access response message including a time alignment value or obtaining an uplink synchronization, the UE starts a time alignment timer. If the time alignment timer is in operation, the terminal determines that uplink synchronization is established between the terminal and the base station. If the time alignment timer expires or does not operate, the UE determines that uplink synchronization is not established between the UE and the BS, and the UE does not perform uplink transmission except for transmission of the random access preamble.

On the other hand, in a multi-element carrier system, one terminal communicates with a base station through a plurality of element carriers or a plurality of serving cells. If all the signals transmitted from the terminal to the base station through the plurality of serving cells have the same time delay, the terminal can acquire uplink synchronization for all the serving cells with one time alignment value. On the other hand, if the signals transmitted to the base station through the plurality of serving cells have different time delays, different time alignment values are required for each serving cell. In this case, there may be several time alignment values, which are referred to as multiple timing alignment values. The uplink synchronization procedure involving multiple time alignment values is referred to as multiple timing alignment (M-TA) or multiple timing advance (M-TA).

If the UE performs a random access procedure for each serving cell in order to obtain a multi-time alignment value, the number of random access procedures required for uplink synchronization acquisition increases, resulting in overhead on limited UL and DL resources And the complexity of the synchronization tracking procedure for maintaining the uplink synchronization can be increased. A timing alignment group (TAG) is defined to reduce this overhead and complexity. The time alignment group may be referred to as a timing advance group.

The TAG is a group that includes among the serving cells in which the UL CC is configured, the same timing alignment value and the same timing reference or serving cell (s) using a timing reference cell comprising the timing reference. Here, the timing reference is DL CC, which is the basis of calculation of the time alignment value. For example, if the first serving cell and the second serving cell belong to TAG1 and the second serving cell is a timing reference cell, the same time alignment value TA1 is applied to the first serving cell and the second serving cell, Applies the TA1 value based on the DL synchronization point of time of the DL CC of the second serving cell. On the other hand, if the first serving cell and the second serving cell belong to TAG1 and TAG2, respectively, the first serving cell and the second serving cell are timing reference cells in the corresponding TAG, and the first serving cell and the second serving cell have different time Alignment values TA1 and TA2 are applied, respectively. The TAG may comprise a main serving cell, may comprise at least one secondary serving cell, and may include a primary serving cell and at least one secondary serving cell.

The main serving cell does not change the TAG. Also, the terminal must be able to support at least two TAGs when multi-time alignment values are needed. For example, it should be able to support pTAG (primary TAG) including main serving cell and TAG separated by sTAG (secondary TAG) without main serving cell. Here, there is always only one pTAG, and sTAG can exist at least one if multiple time alignment values are needed. That is, if a multi-time alignment value is required, the TAG may be set to a plurality of TAGs. For example, the maximum number of TAGs can be set to four. Also, pTAG can always be set to have a value of TAG ID = 0, or to have no value.

The serving base station and the terminal may perform the following operations for acquiring and maintaining a time alignment (TA) value for each TAG.

1. The serving base station and the terminal acquire and maintain the time alignment value of the pTAG through the main serving cell. Also, the timing reference that is the basis for calculating and applying the TA value of pTAG is always the DL CC in the main serving cell.

2. Non-contention-based RA procedures initiated by the base station are used to obtain initial uplink time alignment values for sTAG.

3. A timing reference to sTAG may be used for one of the active secondary serving cells. However, it is assumed that there is no change in unnecessary timing reference.

4. Each TAG has one timing reference and one time alignment timer (TAT). And each TAT may be configured with a different timer expiration value. The TAT starts or restarts immediately after acquiring the time alignment value from the serving base station in order to inform the validity of the time alignment value acquired and applied by each TAG.

5. If the TAT of pTAG is not in progress, the TAT for all sTAGs should not be in progress. That is, when the TAT of pTAG expires, the TAT of all TAGs including pTAG expires and the TAT for all sTAGs can not start when the TAT for pTAG is not in progress.

A. When the TAT of pTAG expires, the UE flushes the HARQ buffers of all the serving cells. And also clears the resource allocation configuration for all downlink and uplink. For example, when periodic resource allocation is configured without control information transmitted for the purpose of resource allocation for downlink / uplink such as a PDCCH like a semi-persistent scheduling (SPS) scheme, the SPS configuration is initialized do. Also, the configuration of PUCCH and Type 0 (periodic) SRS of all serving cells is released.

6. If the TAT of the sTAG has expired, proceed as follows.

A. Stop SRS transmission through UL CC of sTAG internal serving cells.

B. Type 0 (periodic) Unconfigure SRS. Type 1 (aperiodic) SRS configuration is maintained.

C. Maintain configuration information for CSI reports.

D. flags the HARQ buffers for the uplink of the sTAG internal serving cells.

7. If the TAT for the sTAG is in progress, the terminal proceeds without stopping the TAT of the corresponding sTAG even if all the serving cells in the sTAG are deactivated. This guarantees the validity of the TA value of the corresponding sTAG through the TAT even when all the serving cells in the sTAG are deactivated and no SRS or uplink transmission for tracking uplink synchronization is maintained for a specific time . It also means that SRS resource allocation etc. is not released even if all the serving cells are deactivated.

8. If the last secondary serving cell in the sTAG is removed, ie no serving cell is configured in the sTAG, the TAT in that sTAG is stopped.

9. The random access procedure for the secondary serving cell can be performed by transmitting a PDCCH indication (order) indicating the start of the random access procedure through the PDCCH, which is the physical layer control information channel, to the activated secondary serving cell. The PDCCH indication includes random access preamble index information available in the sTAG internal serving cell of the corresponding UE and PRACH mask index information allowing random access preamble transmission for all or part of time / frequency resources available in the serving secondary cell . Thus, the random access procedure for the secondary serving cell proceeds only through the contention-based random access procedure. Here, the included random access preamble information in the PDCCH indication must be indicated with information other than '000000' in order to indicate the contention-based random access procedure.

10. PDCCH and PDSCH for Random Access Response (RAR) message transmission can be transmitted through the main serving cell.

11. When the number of retransmission of the random access preamble of the serving cell reaches the maximum allowable retransmission count: A) The MAC layer stops the random access procedure. B) The MAC layer does not notify the RRC layer that the random access has failed. And thus does not trigger triggering of radio link failure (RLF). C) The terminal does not notify the base station that the random access of the serving cell has failed.

12. The path attenuation reference of the pTAG may be a primary serving cell or a secondary serving cell within a pTAG, and the base station may set differently for each serving cell within the pTAG through RRC signaling.

13. The path attenuation reference of the uplink CCs of each serving cell in the sTAG is a downlink CC with SIB2 connection established. Here, the SBC2 connection establishment means a connection establishment between the DL CC configured based on the information in the SIB1 of the secondary serving cell and the UL CC configured based on the information in the SIB2. Here, SIB2 is one of the system information blocks transmitted through the broadcasting channel, and the SIB2 is transmitted from the base station to the UE through the RRC reconfiguration procedure when configuring the secondary serving cell. SIB2 includes uplink center frequency information, and SIB1 includes downlink center frequency information.

The hardware structure of the terminal is very diverse. Even though a base station can calculate a multi-time alignment value for a plurality of serving cells configured in a mobile station, a case in which a mobile station can not apply a plurality of time alignment values to actual communication due to a constraint on the capability of the mobile station Can be. That is, a terminal supporting multi-time alignment on the hardware structure of the terminal and a terminal not existing exist. Therefore, in order to smoothly operate the multi-element carrier system, the BS must know whether the MS supports multi-time alignment, and a protocol must be established between the MS and the BS.

In a simple manner, the terminal signals to the base station information (multi-time alignment performance information) about how it can support multi-time alignment (M-TA) If so, the base station may or may not perform multi-time alignment with the terminal based on the signaling. The ability of the terminal to support multiple uplink time alignment (or synchronization acquisition) operations is referred to as M-TA capability.

A message of the RRC layer may be used for signaling about the multi-time alignment performance of the UE. More specifically, for signaling on multi-time alignment performance, a UE capability transfer procedure may be used. The performance information of the UE is used to inform the network of the radio access performance such as basic hardware performance or physical performance of the UE. Since the multi-time alignment performance is closely related to the hardware structure of the terminal, the performance information of the terminal defining the hardware structure of the terminal can be configured to include information on the multi-time alignment performance or signaling.

In the following, a method for constructing multi-time alignment performance information is disclosed in detail. Carrier aggregation can be broadly divided into band-to-band carrier aggregation and in-band carrier aggregation. Since the multi-time alignment performance is based on carrier aggregation, the terminal's ability to support multi-time alignment can also be defined separately for interband carrier aggregation and in-band carrier aggregation.

Since a terminal can change a combination of bands that can be simultaneously supported according to a hardware configuration, band combination configuration information indicating a combination of bands supported by the terminal must be provided to the base station. Preferably, the configuration information on the band combination may include not only band combinations that the terminal can support, but also whether or not the multi-time alignment performance is supported. That is, the configuration information on the band combination may include a separate information field indicating that the terminal supports or does not support multi-time alignment.

The configuration information on the band combination includes a supportedBandCombination information field indicating the number of total band combinations supported and a BandCombinationParameter information field indicating the number of bands included in each combination . And, the band combination parameter information field may include MTA support information indicating that multi-time alignment is supported in each band combination.

The MTA support information may include two types of information fields that are differently defined according to the band environment in which the terminal supports multi-time alignment. Hereinafter, the two types of information fields are referred to as a first information field and a second information field. The MTA support information may include either or both of a first information field and a second information field. That is, the MTA support information may optionally include a first information field and a second information field.

As a first embodiment, the configuration information on the band combination can be defined as a syntax including MTA support information as shown in the following table.

RF-Parameters :: = SEQUENCE { supportedBandCombination SupportedBandCombination } SupportedBandCombination :: = SEQUENCE (SIZE (1..maxBandComb)) OF BandCombinationParameters BandCombinationParameters :: = SEQUENCE { multipleTA ENUMERATED {supported} OPTIONAL, intrabandMultipleTA ENUMERATED {supported} OPTIONAL, }

Referring to Table 1, the supportedBandCombination for the band combination may be included in the RF-parameters information field. In addition, the supportedBandCombination for the band combination includes a supportedBandCombination information field and a BandCombinationParameter information field. And a BandCombinationParameter information field contains MTA support information.

The MTA support information again includes at least one of a first information field and a second information field, for example, the first information field is the multiple-time alignment information field of Table 1, Lt; / RTI > information field.

The first and second information fields will be described in more detail as follows.

In one aspect, the first information field indicates that the terminal supports time alignment of uplink element carriers belonging to different bands in each band combination (hereinafter referred to as multi-band band alignment), and the second information field indicates that the terminal supports each band (Hereinafter referred to as in-band multi-time alignment) of uplink element carriers belonging to a single band in a combination. A first information field and a second information field are optionally included in a Band Composition parameter information field.

At this time, scenarios related to selective inclusion of the first information field and the second information field are as follows. i) If only the first information field is included in the BandCombinationParameter information field, the terminal supports inter-band multi-time sorting and does not support intra-band multi-time sorting. ii) If only the second information field is included in the BandCombinationParameter information field, the terminal supports multi-time alignment in the band and does not support inter-band multi-time alignment. iii) If both the first information field and the second information field are included in the Band Composition Parameter information field, the terminal supports both inter-band multi-time sorting and in-band multi-time sorting. iv) If neither the first information field nor the second information field is included in the BandCombinationParameter information field, the terminal does not support both inter-band multi-time sorting and in-band multi-time sorting.

That is, the fact that the second information field is included in the band combination parameter information field indicates that the multi-time alignment in a single band is ON, and that not included indicates that the multi-time alignment in a single band is OFF. Whether or not the second information field is included may be indicative of ON or OFF for all single bands in the band combination. That is, it is possible to indicate whether or not the multi-time alignment of the uplink component carrier in the band is supported for all frequency bands within the band combination.

The scenario according to Table 1 will be described as an example. For example, let's say that the band simultaneously supported by the terminal is {band 1}, {band 1, band 2}, {band 1, band 2, band 3}. The total number of band combinations supported is three, which is indicated by the supportedBandCombination information field. The maxBandComb, which is the maximum number of band combinations supported, may be 128, for example.

Next, the number of bands included in the first combination {band 1} is one, which is indicated by the first BandCombinationParameter information field. The number of bands included in the second combination {band 1, band 2} is 2, which is indicated by the second BandCombinationParameter information field. The third combination, {Band 1, Band 2, Band 3}, has three bands, which is indicated by a third BandCombinationParameter information field. That is, the BandCombinationParameter information field exists as many as the number of band combinations supported, and is inserted as a subfield of the support band combination information field. The bands included in each combination are combinations of bands simultaneously supported by the terminal, and the maximum value of maxSimultaneousBands may be 64, for example.

Next, when the first information field is included in the second band combination parameter information field, it indicates that carrier aggregation and multi-time alignment are supported between uplink component carriers of different bands. That is, carrier aggregation and multi-time alignment are supported between the uplink component carrier of band 1 and the uplink carrier component of band 2. If the second information field is included in the second band combination parameter information field, it indicates that carrier aggregation and multi-time alignment are supported between uplink element carriers of a single band. That is, carrier aggregation and multi-time alignment are supported between a plurality of uplink component carriers in the first band, and carrier aggregation and multi-time alignment are supported between a plurality of uplink component carriers in the second band.

If there is only one frequency band in the band combination as in the first band combination, the first information field should be included in the first band combination parameter information field to indicate whether the single band intra-band multi-time sorting is supported , And a second information field to indicate that carrier aggregation and multi-time alignment are supported between uplink element carriers of a single band.

In another aspect, the first information field may indicate that the terminal supports time alignment of uplink element carriers belonging to different bands in each band combination, while indicating that the terminal generally supports multi-time alignment. The second information field may indicate that the UE supports time alignment of uplink component carriers belonging to a single band in each band combination. In addition, a first information field and a second information field are optionally included in a Band Composition parameter information field, respectively.

At this time, scenarios related to selective inclusion of the first information field and the second information field are as follows. i) If only the first information field is included in the BandCombinationParameter information field, the terminal supports multi-time alignment but supports inter-band multi-time alignment and does not support intra-band multi-time alignment. ii) When both the first information field and the second information field are included in the band combination parameter information field, the terminal supports multi-time sorting, and supports both inter-band multi-time sorting and in-band multi-time sorting . iii) If neither the first information field nor the second information field is included in the Band Composition parameter information field, the terminal does not support both multi-time sorting, band-to-band multi-time sorting and in-band multi-time sorting.

For example, if the UE can use both frequency bands # 7 (xxx to xxxMhz) and # 15 (yyy to yyyMhz) simultaneously and use the band combination parameters (BandCombinationParameters :: = SEQUENCE (SIZE (1..maxSimultaneousBands)) can do. When supporting information for multi-time alignment is configured for the band combination, the UE can configure MTA support information differently according to the support type of multi-time sorting.

1. Support inter-band MTA;

(First information field) multipleTA = supported

(Second information field) intrabandMultipleTA = none

multipleTA ENUMERATED {supported} OPTIONAL, ...

2. Inter-frequency band + intra-band MTA support

(First information field) multipleTA = supported

(Second information field) intrabandMultipleTA = supported

multipleTA ENUMERATED {supported} OPTIONAL, intrabandMultipleTA ENUMERATED {supported} OPTIONAL,

As another example, the terminal supports only frequency band # 7 (xxx to xxxMhz). When the support information for multi-time alignment is configured for the band combination (single band combination), MTA support information can be configured differently according to the support mode of multi-time sorting.

1. Supports intra-band MTAs

(First information field) multipleTA = supported

(Second information field) intrabandMultipleTA = supported

multipleTA ENUMERATED {supported} OPTIONAL, intrabandMultipleTA ENUMERATED {supported} OPTIONAL,

On the other hand, in the case of inter-frequency band + intra-band MTA support and intra-band MTA support, the configuration for MTA support information may look the same, but the number of bands in band combination parameter information maxSimultaneousBands).

As a second embodiment, the configuration information on the band combination may be defined by the syntax shown in the following table.

RF-Parameters :: = SEQUENCE { supportedBandCombination SupportedBandCombination } SupportedBandCombination :: = SEQUENCE (SIZE (1..maxBandComb)) OF BandCombinationParameters BandCombinationParameters :: = SEQUENCE { multipleTA ENUMERATED {supported} OPTIONAL, supportedIntrabandMultipleTASet SupportedIntrabandMultipleTASet OPTIONAL } SupportedIntrabandMultipleTaset :: = BIT STRING (SIZE (1..maxSimultaneousBands))

Referring to Table 5, it is different from Table 1 that the band combination parameter information field includes a supportedIntrabandMultipleTASet information field in the support band, and the remaining information fields are the same. That is, in Table 1, the second information field is the intraband MultiTableTA information field whereas the second information field is the supportedIntrabandMultipleTASet information field in the support band.

Here, the scenario relating to the selective inclusion of the first information field and the second information field may be the same as applying the concept described in Tables 1 to 4 to Table 5. [

The supportedIntrabandMultipleTASet information field is a bit string structure that maps each bit of the bit string to a single band in a 1: 1 manner. For example, if the value of a specific bit is 1, the UE supports time alignment of uplink component carriers belonging to a single band mapped to the specific bit, and if the value of the specific bit is 0, Indicates that the element carriers do not support time alignment. That is, it is possible to indicate whether or not the multi-time sorting of the uplink component carrier in the band is supported for each frequency band. Here, the length of the bit string is defined as the number of bands simultaneously supported in each corresponding band combination supported by the UE, and can not exceed the maximum number of simultaneous Bands that the UE can simultaneously support.

In addition, there is an uplink band parameter information field as a parameter related to band combination. The uplink band parameter information field includes an element carrier class (ca-BandwidthClassUL) information field and a supported MIMO (CapabilityUL) information field as subfields. The element carrier class information field defines an element carrier class for each of the bands to be aggregated at the same time. For example, the element carrier class can be classified as A to F as shown in the following table, and a transport bandwidth configuration, a maximum number of CCs, and a protection bandwidth are defined for each element carrier class.

Element carrier
class Aggregated transmission bandwidth configuration Max CC
Count Protection bandwidth BW _GB
(Nominal Guard Band) A N _{RB , agg} = 100 One 0.05BW _{Channel (1)} B N _{RB , agg} = 100 2 Undefined C 100 < N _{RB , agg} = 200 2 0.05 max (BW _{Channel (1)} , BW _{Channel (2)} ) D 200 < N _{RB , agg} = 300 3 Undefined E 300 < N _{RB , agg} = 400 4 Undefined F 400 < N _{RB , agg} = 500 5 Undefined

Referring to Table 6, in the case of the element carrier class A, since the maximum number of CCs configurable in the corresponding band is 1, no carrier aggregation occurs in the corresponding band. And the transmission bandwidth aggregated by at most one CC is composed of up to 100 resource blocks ( _{RB , agg} ≤ 100). In the case of the element carrier class B, the maximum number of CCs in the corresponding band is 2, so that aggregation by a maximum of two CCs in the corresponding band is possible. Also, since N _{RB , agg} ≤ 100, the transmission bandwidth aggregated by up to two CCs is composed of up to 100 resource blocks. Meanwhile, BW _{Channel (1)} and BW _{Channel (2)} mean the channel bandwidths of two E-UTRA element carriers according to the following table.

Channel bandwidth
BW _Channel [MHz] 1.4 3 5 10 15 20 Transmission bandwidth configuration N _RB 6 15 25 50 75 100

Referring to Table 7, the type of the bandwidth of the uplink or downlink carrier of each serving cell used in the LTE system can be known.

For example, the element carrier classes that two bands can have are the following three scenarios.

Band combination 1 to 3 Band 1 Band 2 Scenario 1 Downlink: CA Class 'A', MIMO enable
Uplink: CA Class 'A', MIMO enable Downlink: CA Class 'A', MIMO enable
Uplink: CA Class 'A', MIMO enable Scenario 2 Downlink: CA Class 'A', MIMO enable
Uplink: CA Class 'x', MIMO enable Downlink: CA Class 'A', MIMO enable
Uplink: CA Class 'A', MIMO enable Scenario 3 Downlink: CA Class 'y', MIMO enable
Uplink: CA Class 'z', MIMO enable Downlink: CA Class' y '', MIMO enable
Uplink: CA Class' z '', MIMO enable

Referring to Table 8, Scenario 1 is a case in which the uplink component carrier classes of band 1 and band 2 are both A, In this case, the ca-BandwidthClassUL field corresponding to band 1 and the ca-BandwidthClassUL information field corresponding to band 2 both indicate A, Element CA Class A means that only one element carrier is supported in the band. Therefore, since only one element carrier is supported for each of the bands 1 and 3, it means that two element carriers are supported in the terminal. Therefore, Scenario 1 means that band-to-band carrier aggregation is possible, and carrier aggregation using different bands 1 and 3 is possible.

In Scenario 2, the uplink component carrier class of band 1 is x and the uplink component carrier class of band 3 is A. [ x may be any one of B to F. In other words, only one element carrier is supported in one band and two or more element carrier aggregation is supported in the other band. The ca-BandwidthClassUL field corresponding to band 1 indicates one of B to F, and the ca-BandwidthClassUL field corresponding to band 3 indicates A. Therefore, while only band 3 refers to non-CA, two or more element carriers are supported in band 1, which means that two or more element carriers are consequently supported in the terminal. Therefore, Scenario 2 means that band-to-band carrier aggregation is possible, and carrier aggregation using different bands 1 and 3 is possible.

In scenario 3, the uplink component carrier class of band 1 is z and the uplink component carrier class of band 3 is z '. z and z 'may be any one of B to F. That is, a plurality of element carriers are supported in both bands. The ca-BandwidthClassUL fields corresponding to band 1 and band 3 indicate one of B to F, respectively. Since two or more element carriers are supported in both band 1 and band 3, it is concluded that two or more element carriers are supported in the terminal. Therefore, Scenario 3 means that band-to-band carrier aggregation is possible, and carrier aggregation using different bands 1 and 3 is possible.

The description of the scenario of Table 8 only exemplifies the uplink carrier aggregation, but it can be equally applied to the downlink carrier aggregation.

The situation where the terminal needs to support multi-time alignment is summarized as follows. Depending on the network configuration, there is an environment in which multi-time alignment must be supported. In case of the interband CA for the uplink, even though the same signal is transmitted from a plurality of uplink element carriers aggregated in the terminal, due to the signal propagation characteristics for different frequencies, The time at which the signal of the main path arrives at the base station may be different from each other. Therefore, the network or the base station can determine that different time alignment values can be set for the uplink component carriers potentially formed between the bands.

However, in the case of an intra-band CA, a situation in which a terminal may actually support multi-time alignment, but may require multi-time alignment in a network, is that some frequency bands in the band are remote radio head RRH) or a relay (relay). Repeaters are designed to relay radio signals only to the frequency bands currently being serviced by each network operator. This is because relaying to other frequency bands is impossible in a wired repeater. Also, in the case of an interference cancellation system (ICS) repeater, which is a typical wireless repeater, when a network operator relays a frequency band other than the frequency band currently being serviced, a result which is not intended for signals that may exist in the frequency band . Therefore, in the case of a wireless repeater, only the wireless signal limited to the frequency band currently being serviced is relayed.

On the other hand, the licensed frequency band of the network operator and the operating band defined in the standard can not always be set to be the same, and a method of relaying only some frequency bands in the licensed frequency band, A plurality of frequency allocations (FAs) are formed within the FA, but there may be a case where only some FAs are relayed. Depending on the service area, there may be areas where the repeater is installed or not. Therefore, it may happen that the repeater operation for in-band carrier aggregation in the network is not applied to the entire frequency band in the band. Therefore, multiple time alignment may be required by the network when aggregating the carriers in the uplink band.

If the terminal supports multi-time alignment and supports both FDD and TDD modes, multi-time alignment in the FDD is always considered to be supported. For example, in the case of a full duplex such as FDD, even if partial overlapping occurs between subframes due to multi-time alignment, the UE can be designed to support multi-time alignment without problems. However, in the case of TDD, the frequency band may be different from that of the FDD, and the TDD operation may be a structure in which multi-time alignment can not be supported. For example, in the case of semi-duplex such as TDD, a partial overlap between subframes transmitted through different serving cells caused by multi-time alignment is continuously generated as a partial overlap of uplink / downlink. In case of a terminal which can not solve this problem, for example, a terminal supporting only semi-duplex, it can not support multi-time alignment.

On the other hand, since band combinations in which FDD and TDD support carrier aggregation are different from each other, support for multi-time alignment in FDD and TDD is also different. However, if all band combinations of one signaling FDD / TDD can be expressed, the multi-time alignment information can be transmitted as one piece of information. That is, when a band combination signal configuration including both FDD and TDD is used as in the conventional method, both FDD and TDD information can be transmitted by single signaling.

5 is a flowchart illustrating a signaling procedure for multi-time alignment performance according to an exemplary embodiment of the present invention. This is a performance transmission procedure of the UE.

Referring to FIG. 5, a radio access network transmits a UE capability inquiry message to a mobile station (S500). For example, the radio access network includes a universal terrestrial radio access network (UTRAN) according to the 3GPP standard. The terminal may be in a radio connected state. The wireless access network may initiate performance procedures of the terminal when performance information of the terminal is needed. The performance inquiry message of the UE includes a UE capability request field. The capability request field of the UE requests a list of wireless access networks that the UE can support. For example, the capability request field of the UE may include any one of E-UTRA, UTRA, GERAN-CS, GERAN-PS, and CDMA2000. If the capability request field of the UE includes E-UTRA, the UE can set the radio access network type field to E-UTRA.

Then, the terminal configures band combination parameter information indicating a combination of bands supported by the terminal from among a plurality of bands (S505). In this case, the band combination parameter information includes a first information field indicating that the UE supports time alignment of uplink component carriers belonging to different bands in the combination as shown in Table 1 or Table 5, And a second information field indicating to support time alignment of uplink element carriers belonging to a single band.

As an example, if the second information field is included in the Band Composition parameter information field, the terminal supports time alignment of uplink component carriers belonging to a single band, otherwise, the terminal may transmit uplink component carriers It does not support time alignment for. That is, the fact that the second information field is included in the band combination parameter information field indicates that the multi-time alignment in a single band is ON, and that not included indicates that the multi-time alignment in a single band is OFF. Whether or not the second information field is included may be indicative of ON or OFF for all single bands in the band combination.

As another example, the second information field is a bit string structure, which maps each bit of the bit string to a single band in a 1: 1 manner. For example, if the value of a specific bit is 1, the UE supports time alignment of uplink component carriers belonging to a single band mapped to the specific bit, and if the value of the specific bit is 0, Indicates that the element carriers do not support time alignment. Here, the length of the bit string may be equal to the maximum number of concurrently supported maximum number of bands (maxSimultaneousBands).

The terminal configures the terminal capability information including the configured band combination parameter information (S510), and transmits the terminal capability information to the base station (S515). The UE capability inquiry message and the terminal capability information may all be RRC messages generated in the RRC layer.

6 is a structural diagram of a terminal supporting multi-time alignment according to an exemplary embodiment of the present invention.

Referring to FIG. 6, a UE 600 includes a main antenna 601, a diversity antenna 605, a duplex filter 610, a Rx filter 615, a power amplifier 620, a first receiving unit 630, a first transmitting unit 650, and a second receiving unit 670.

The first transmitter 650 includes two transmission modules 655 and 660 and each transmission module 655 and 660 includes a baseband processor, a bandpass filter, and a D / A converter . The first transmitter 650 combines the signals for the different uplink component carriers generated from two separate transmission modules (tx modules) 655 and 660 into one by the signal combiner 665, (620).

In this case, due to a phenomenon in which harmonic frequencies of signals of different frequency bands in a band such as intermodulation distortion (IMD) are summed and the output frequency components are combined, There is a high possibility that a signal is generated. The harmonics are the frequency components of the frequency of the original signal. Since the IMD component acts as a signal for distorting the information of the original signal, it is difficult to transmit the frequency combination of the original signals in which the IMD component is high.

Further, since the filtering for two or more transmission signals at different positions must be performed, the power of the emission component can be increased. Therefore, in order to suppress this, the overall transmission power must be greatly reduced. In other words, you need to set a high maximum power reduction (MPR) value.

For this reason, in the structure of the first transmitter 650, the carrier aggregation can be supported only for the carrier aggregation band combination in which the values of the IMD and the MPR can be set small. Therefore, multi-time alignment can be supported for CA band combinations that can support carrier aggregation. In other words, it is possible to support multi-time alignment for some CA band combinations.

The first receiving unit 630 includes two receiving modules 635 and 640 and the second receiving unit 670 includes two receiving modules 675 and 680. Each of the receiving modules 635, 640, 675, and 680 includes a baseband processor, a bandpass filter, and an analog-to-digital converter (A / D converter).

FIG. 7 is a structural diagram of a terminal supporting multi-time alignment according to another example of the present invention.

7, a terminal 700 includes a main antenna 701, a diversity antenna 705, duplex filters 710 and 715, power amplifiers 720 and 725, a first receiving unit 730, A first receiving unit 755, a second receiving unit 770, and a second transmitting unit 780.

The first transmitter 755 and the second transmitter 780 include a baseband processor, a bandpass filter, and a D / A converter, respectively. The first and second transmitting units 755 and 780 separate signals of different uplink component carriers from each other and input them to the power amplifiers 720 and 725. The first and second transmitting units 755 and 780 receive the signals of the uplink component carriers through separate antennas 701 and 705 . The first receiving unit 730 and the second receiving unit 770 each include two receiving modules 730, 740, 765 and 775. Each receiving module includes a baseband processor, a bandpass filter, an analog / digital converter A / D converter).

The terminal 700 having such an RF structure can support multi-time alignment for many band combinations for the frequency bands supported by the respective transmitters 755 and 780, or in-band combination.

FIG. 8 is a structural diagram of a terminal supporting multi-time alignment according to another example of the present invention.

8, the terminal 800 includes a main antenna 801, a diversity antenna 805, a duplex filter 810, a reception filter 815, power amplifiers 820 and 822, a signal combiner 824, And includes a first receiving unit 830, a first transmitting unit 855, a second transmitting unit 860, and a second receiving unit 870.

The first transmitter 855 and the second transmitter 860 include a baseband processor, a band pass filter, and a D / A converter, respectively. Signals for the different uplink component carriers generated from the two first and second transmission sections 855 and 860 are input to the power amplifiers 820 and 822 separated from each other and are transmitted through the same main antenna 801 . The first receiving unit 830 and the second receiving unit 870 each include two receiving modules 835, 840, 875 and 880. Each receiving module includes a baseband processor, a bandpass filter, an analog-to-digital converter A / D converter).

The terminal 800 having such an RF structure can support multi-time alignment for many band combinations or frequency band combinations supported by the respective transmitters 855 and 860. 7, since the two signals are combined and transmitted to the same main antenna 801, the signals of the respective transmitters 855 and 860 are transmitted at a 3 dB lower output (or transmit power) Lt; / RTI &gt;

If it is confirmed that the terminal supports multi-time alignment based on the performance information of the terminal, the base station can perform the procedure of acquiring the multi-time alignment value with the terminal in the future. The procedure for obtaining the multi-time alignment value is as follows.

9 is a flowchart illustrating a procedure for obtaining a multi-time alignment value according to an exemplary embodiment of the present invention.

Referring to FIG. 9, the UE and the BS perform an RRC connection establishment procedure through a selected cell (S900). The selected cell becomes the main serving cell. The RRC connection setup procedure includes a base station transmitting an RRC connection setup message to the UE, and a UE transmitting an RRC connection setup complete message to the base station.

The base station performs an RRC connection reconfiguration procedure to further configure one or more secondary serving cells to the terminal (S905). The addition of the secondary serving cell may be performed, for example, in the case where a more requesting radio resource needs to be allocated to the terminal by a request of the terminal, a request of the network, or a self-determination of the base station. Adding a secondary serving cell to a terminal or removing a secondary serving cell configured in the terminal may be indicated by an RRC connection reconfiguration message. The RRC connection reconfiguration procedure includes a base station transmitting an RRC connection reconfiguration message to the UE, and a UE transmitting an RRC reconfiguration completion message to the base station.

The base station constructs a TAG for the secondary serving cell added to the UE (S910). The TAG setting between the serving cells may be cell-specific depending on the carrier aggregation state. For example, when a serving cell in a specific frequency band is always provided through an FSR or a remote radio head (RRH), the serving cell of the specific frequency band and the frequency band directly served from the base station Can be set to belong to different TAGs, apart from the fact that the FSR or the remote wireless head could not be set to the same time alignment value if there was no serving cell.

As an example, if the base station determines that the same time alignment value as that of the main serving cell can be applied to the secondary serving cell, it sets the secondary serving cell to the same TAG as the primary serving cell. In this case, the base station does not transmit separate TAG configuration information as in step S915. That is, if the UE additionally configures a secondary serving cell and does not receive the TAG configuration information (for example, TAG ID) for the secondary serving cell, the UE transmits the secondary serving cell to the same TAG Lt; / RTI &gt;

As another example, if the base station determines that the same time alignment value as the main serving cell can not be applied to the secondary serving cell, it sets the secondary serving cell to another sTAG. At this time, if the base station confirms that the sTAG including the secondary serving cell is a different TAG from the TAGs configured in the past, the TAG ID may be given to the sTAG before acquiring the uplink synchronization through the random access procedure. However, when the base station determines that the secondary serving cell may be included in the TAG configured in the past, the TAG ID can not be given to the sTAG before acquiring the uplink synchronization through the random access procedure. Therefore, in this case, the UE acquires i) uplink synchronization, and ii) when receiving the TAG configuration information by the base station, the serving cell can acquire the TAG ID of the sTAG to which it belongs.

If it is determined that two or more TAGs need to be configured in the terminal, the base station performs an RRC connection reconfiguration procedure for transmitting the TAG configuration information to the terminal (S915). The TAG configuration information is information for controlling the addition, change, or removal of each TAG for a specific terminal. That is, the TAG configuration information is defined on a terminal-by-terminal basis. And, to which TAG the secondary serving cell belongs is indicated by the secondary serving cell configuration information. That is, a TAG ID is assigned to each sub-serving cell. More specifically, the TAG configuration information is transmitted in the MAC configuration information, which is one form of the RRC message, and the TAG configuration information includes a TAG ID indicating each TAG to be added, changed or removed, a time corresponding to each TAG And includes a setting value of an alignment timer.

The secondary serving cell configuration information includes a TAG ID indicating a TAG to which each secondary serving cell is to be included, and the secondary serving cell configuration information is included in the MAC configuration information specific to the secondary serving cell and transmitted. Since the main serving cell is always TAG ID = 0, there is no TAG configuration information. Also, when there is no TAG ID setting information among the secondary serving cells, the secondary serving cells may indicate serving cells in the pTAG. Only the TAG ID can be changed to change the TAG of a particular serving cell. That is, the base station can change the TAG by releasing (removing) the existing serving cell configuration and performing RRC connection reconfiguration to update the secondary serving cell configuration with the changed TAG ID.

In the case of scheduling for a particular secondary serving cell, the base station transmits an activation indicator for activating the specific secondary serving cell to the terminal in operation S920.

If the UE fails to secure uplink synchronization in at least one sTAG, it must obtain a multi-time alignment value to be adjusted for the at least one sTAG. This may be implemented through a random access procedure indicated by the base station (S925).

The random access procedure for the active secondary serving cell in the sTAG may be initiated by a PDCCH indication sent by the base station. A serving cell that is capable of receiving a PDCCH indication may be limited to a serving serving cell with a designated timing reference within the sTAG and may be any serving serving cell configured with RACH or all serving serving cells configured with RACH related parameters.

When the UE receives the random access response message from the BS, the UE determines that the random access procedure has been successfully completed and updates the multi-time alignment value for each serving cell (S930). The random access response message may be included in a RAR MAC protocol data unit (PDU) received and included in a PDSCH indicated by a PDCCH scrambled with a random access-radio network temporary identifier (RA-RNTI).

10 is a flowchart illustrating a method for transmitting terminal capability information according to an exemplary embodiment of the present invention.

Referring to FIG. 10, the terminal receives a terminal performance inquiry message from a base station (S1000). The performance inquiry message of the UE includes a UE capability request field. The capability request field of the UE requests a list of wireless access networks that the UE can support. For example, the capability request field of the UE may include any one of E-UTRA, UTRA, GERAN-CS, GERAN-PS, and CDMA2000. If the capability request field of the UE includes E-UTRA, the UE can set the radio access network type field to E-UTRA.

The terminal configures band combination parameter information indicating a combination of bands supported by the terminal from among a plurality of bands (S1005).

As a first embodiment, the band combination parameter information can be defined as shown in Table 1. A first information field indicating that the UE supports time alignment of uplink component carriers belonging to different bands in the combination, and a second information field indicating that the UE supports time alignment of uplink component carriers belonging to a single band in the combination And a second information field to be used for the second information field.

In one aspect, the first information field indicates that the terminal supports time alignment (hereinafter, interband identification) of uplink element carriers belonging to different bands in each band combination, and the second information field indicates that the terminal supports each band combination (Hereinafter referred to as in-band multi-time alignment) of uplink element carriers belonging to a single band. A first information field and a second information field are optionally included in a Band Composition parameter information field.

For example, if the second information field is included in the BandCombinationParameter information field, the terminal supports time alignment of uplink component carriers belonging to a single band, otherwise, the terminal can transmit uplink component carriers belonging to a single band It does not support time alignment for. That is, the fact that the second information field is included in the band combination parameter information field indicates that the multi-time alignment in a single band is ON, and that not included indicates that the multi-time alignment in a single band is OFF. Whether or not the second information field is included may be indicative of ON or OFF for all single bands in the band combination.

In another aspect, the first information field may indicate that the terminal supports time alignment of uplink element carriers belonging to different bands in each band combination, while indicating that the terminal generally supports multi-time alignment. The second information field may indicate that the UE supports time alignment of uplink component carriers belonging to a single band in each band combination. In addition, a first information field and a second information field are optionally included in a Band Composition parameter information field, respectively.

At this time, scenarios related to selective inclusion of the first information field and the second information field are as follows. i) If only the first information field is included in the BandCombinationParameter information field (Table 2), the terminal supports multi-time alignment but supports multi-band alignment between bands, Not supported. ii) When both the first information field and the second information field are included in the Band Composition Parameter information field (in case of Table 3), the terminal supports multi-time alignment, It supports all time alignment. iii) If neither the first information field nor the second information field is included in the Band Composition parameter information field, the terminal does not support both multi-time sorting, band-to-band multi-time sorting and in-band multi-time sorting.

As a second embodiment, the band combination parameter information can be defined as shown in Table 5. That is, the description of Table 5 can be directly applied to the second embodiment. The second information field is a bit string structure in which each bit of the bit string is mapped to a single band by 1: 1. For example, if the value of a specific bit is 1, the terminal supports multi-time alignment between uplink component carriers belonging to a single band mapped to the specific bit, and if the value of the specific bit is 0, the terminal belongs to a single band And does not support multi-time alignment between uplink element carriers. Here, the length of the bit string can not exceed the maximum number of concurrently supportable frames (maxSimultaneousBands).

The terminal configures the terminal capability information including the configured band combination parameter information (S1010), and transmits the terminal capability information to the base station (S1015). The UE capability inquiry message and the terminal capability information may all be RRC messages generated in the RRC layer.

11 is a flowchart illustrating a method of receiving a terminal capability information by a base station according to an exemplary embodiment of the present invention.

Referring to FIG. 11, the BS determines whether terminal capability information exists (S1100). If there is no terminal capability information or if updating is required, the base station transmits a terminal capability inquiry message to the terminal (S1105). The performance inquiry message of the UE includes a UE capability request field. The capability request field of the UE requests a list of wireless access networks that the UE can support. For example, the capability request field of the UE may include any one of E-UTRA, UTRA, GERAN-CS, GERAN-PS, and CDMA2000.

If the capability request field of the UE includes E-UTRA, the UE can set the radio access network type field to E-UTRA.

The base station receives terminal capability information including band combination parameter information indicating a combination of bands supported by the terminal from among a plurality of bands (S1110). In this case, the band combination parameter information includes a first information field indicating that the UE supports time alignment of uplink component carriers belonging to different bands in the combination as shown in Table 1 or Table 5, And a second information field indicating to support time alignment of uplink element carriers belonging to a single band.

In step S1115, the base station determines whether the terminal supports multi-time alignment based on the multi-time alignment performance information included in the terminal capability information. After confirming that the terminal supports multi-time alignment, the base station can then perform multi-time alignment based on the procedure of FIG.

12 is a block diagram illustrating a terminal and a base station transmitting and receiving terminal capability information according to an exemplary embodiment of the present invention.

12, the terminal 1200 includes a receiving unit 1205, a terminal processor 1210, and a transmitting unit 1215. In addition, the terminal processor 1210 includes a message processor 1211 and a time alignment controller 1212.

The receiving unit 1205 receives the terminal performance inquiry message from the base station 1250. The performance inquiry message of the UE includes a UE capability request field. The capability request field of the terminal requests a list of wireless access networks that the terminal 1200 can support. For example, the capability request field of the UE may include any one of E-UTRA, UTRA, GERAN-CS, GERAN-PS, and CDMA2000. The receiving unit 1205 may include a receiving unit according to any one of FIGS.

The message processing unit 1211 configures band combination parameter information indicating a combination of bands supported by the terminal 1200 among a plurality of bands and configures the terminal capability information including the band combination parameter information . At this time, the band combination parameter information may include MTA support information. For example, the MTA support information may optionally include a first information field and a second information field, as shown in Table 1 or Table 5.

The message processing unit 1211 determines whether the terminal 1200 supports the multi-time sorting based on the characteristics of the receiving unit 1205 or the transmitting unit 1215 in configuring the band combination parameter information, Band combination parameter information may optionally include a first information field and a second information field. For example, if the terminal 1200 supports multi-time alignment, the message processing unit 1211 may include at least one of the first information field and the second information field in the band combination parameter information as shown in Table 1 or Table 5 .

The message processor 1211 configures the terminal capability information including the band combination parameter information, and sends the terminal capability information to the transmitter 1215. The transmission unit 1215 transmits the terminal capability information to the base station 1250.

When the terminal 1200 supports multi-time alignment, the time alignment controller 1212 controls the multi-time alignment to be performed on at least one secondary serving cell or uplink element carrier configured in the terminal 1200. For example, when uplink synchronization can not be secured in a plurality of serving cells configured in the UE 1200, the time alignment controller 1212 performs a procedure of acquiring a multi-time alignment value for a plurality of serving cells. At this time, the procedure of acquiring the terminal multi-time alignment value may be implemented through a random access procedure as shown in FIG.

The base station 1250 includes a transmitter 1255, a base station processor 1260, and a receiver 1265. The base station processor 1260 includes a message processing unit 1262 and a time alignment control unit 1261.

The transmission unit 1255 transmits a terminal performance inquiry message to the terminal 1200 and receives terminal performance information from the terminal 1200.

The message processing unit 1262 checks whether the terminal capability information of the terminal 1200 exists. If there is no terminal capability information or if updating is required, the message processing unit 1262 generates a terminal performance inquiry message and sends it to the RF unit 1255.

When the receiving unit 1265 receives the terminal capability information from the terminal 1200, the message processing unit 1262 analyzes or analyzes the band combination parameter information in the terminal capability information, and outputs the first information field or the second information Field and reports the analyzed or analyzed field to the time alignment control unit 1261.

The time alignment control unit 1261 determines whether the terminal 1200 supports multi-time alignment based on the first information field and / or the second information field. For example, when the band combination parameter information includes the first information field, the time alignment control unit 1261 confirms that the terminal 1200 supports multi-time alignment, and at the same time, It can be confirmed that time alignment of uplink element carriers belonging to different bands is supported.

For example, if the band combination parameter information includes the second information field, the time alignment controller 1261 determines that the terminal 1200 supports time alignment of uplink element carriers belonging to a single band within each band combination .

When the terminal 1200 confirms that it supports intra-band or inter-band multi-time alignment, the time alignment controller 1261 can perform in-band or inter-band multi-time alignment based on the procedure shown in FIG.

The foregoing description is merely illustrative of the technical idea of the present invention and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas falling within the scope of the same shall be construed as falling within the scope of the present invention.

Claims (20)

A method for transmitting terminal capability information by a terminal in a multi-component carrier system,
Receiving, from a base station, a terminal capability inquiry message requesting performance of the terminal;
Configuring band combination parameter information indicating a combination of bands supported by the terminal among a plurality of bands;
Configuring the terminal capability information including the configured band combination parameter information; And
And transmitting the terminal capability information to the base station,
Wherein the band combination parameter information includes:
A first information field indicating that the UE supports time alignment of uplink component carriers belonging to different bands in the combination, and a second information field indicating that the UE supports time alignment of uplink component carriers belonging to a single band in the combination Wherein the first information field comprises a first information field, and the second information field comprises a second information field. The method according to claim 1,
If the second information field is included in the band combination parameter information, the terminal supports time alignment of uplink element carriers belonging to the single band,
Otherwise, the terminal does not support time alignment for uplink element carriers belonging to the single band. The method according to claim 1,
If the second information field is included in the band combination parameter information, for every single band in the combination, the terminal supports time alignment of uplink element carriers belonging to each single band,
Otherwise, for all single bands in the combination, the terminal does not support time alignment of uplink element carriers belonging to each single band. The method according to claim 1,
The second information field is a bit string for mapping each bit and a single band to 1: 1,
If the value of a specific bit is 1, the terminal supports time alignment of uplink element carriers belonging to a single band mapped to the specific bit,
0, the UE does not support time alignment of uplink element carriers belonging to a single band mapped to the specific bit. 5. The method of claim 4,
Wherein the length of the bit string is equal to the maximum number of bands that the terminal can simultaneously support. A terminal for transmitting terminal capability information in a multi-carrier system,
A receiving unit for receiving a terminal performance inquiry message requesting performance of the terminal from a base station;
A message processor configuring band combination parameter information indicating a combination of bands supported by the terminal among a plurality of bands and configuring the terminal capability information including the band combination parameter information;
A time alignment controller for supporting time alignment of at least one uplink element carrier; And
And a transmitter for transmitting the terminal capability information to the base station,
Wherein the message processing unit comprises: a first information field for indicating that the UE supports time alignment of uplink component carriers belonging to different bands in the combination; and a first information field for indicating time alignment of uplink component carriers belonging to a single band in the combination And a second information field indicating that the terminal supports sorting, respectively, in the terminal capability information. The method according to claim 6,
If the second information field is included in the band combination parameter information, the terminal supports time alignment of uplink element carriers belonging to the single band,
Otherwise, the terminal does not support time alignment for uplink element carriers belonging to the single band. The method according to claim 6,
If the second information field is included in the band combination parameter information, for every single band in the combination, the terminal supports time alignment of uplink element carriers belonging to each single band,
Otherwise, for every single band in the combination, the terminal does not support time alignment of uplink element carriers belonging to each single band. The method according to claim 1,
The second information field is a bit string for mapping each bit and a single band to 1: 1,
If the value of a specific bit is 1, the terminal supports time alignment of uplink element carriers belonging to a single band mapped to the specific bit,
0, the UE does not support time alignment of uplink component carriers belonging to a single band mapped to the specific bit. 10. The method of claim 9,
And the length of the bit string is equal to the maximum number of bands that the terminal can simultaneously support. A method for receiving terminal capability information by a base station in a multi-
Transmitting a terminal performance inquiry message requesting performance of the terminal to the terminal;
Receiving, as a response to the terminal capability inquiry message, the terminal capability information from the terminal,
Wherein the terminal capability information includes band combination parameter information indicating a combination of bands supported by the terminal among a plurality of bands,
Wherein the band combination parameter information includes a first information field indicating that the terminal supports time alignment of uplink element carriers belonging to different bands in the combination and a second information field indicating that the terminal supports time alignment of uplink element carriers belonging to a single band in the combination And a second information field indicating that the mobile terminal supports time alignment of the terminal capability information. 12. The method of claim 11,
If the second information field is included in the band combination parameter information, the terminal supports time alignment of uplink element carriers belonging to the single band,
Otherwise, the terminal does not support time alignment for uplink element carriers belonging to the single band. 12. The method of claim 11,
If the second information field is included in the band combination parameter information, for every single band in the combination, the terminal supports time alignment of uplink element carriers belonging to each single band,
Otherwise, for all single bands in the combination, the terminal does not support time alignment of uplink element carriers belonging to each single band. 12. The method of claim 11,
The second information field is a bit string that maps each bit and a single band in a 1: 1 manner,
If the value of a specific bit is 1, the terminal supports time alignment of uplink element carriers belonging to a single band mapped to the specific bit,
0, the UE does not support time alignment of uplink component carriers belonging to a single band mapped to the specific bit. 15. The method of claim 14,
Wherein the length of the bit string is equal to the maximum number of bands that the terminal can simultaneously support. A base station for receiving terminal capability information in a multi-carrier system,
A transmitter for transmitting a terminal performance inquiry message requesting performance of the terminal to the terminal;
A receiver for receiving, from the terminal, the terminal capability information including band combination parameter information indicating a combination of bands supported by the terminal among a plurality of bands; And
A first information field for indicating that the UE supports time alignment of uplink component carriers belonging to different bands in the combination, and a second information field indicating that the UE supports time alignment of uplink component carriers belonging to a single band in the combination Wherein the second information field is included in the band combination parameter information. 17. The method of claim 16,
If the second information field is included in the band combination parameter information, supporting time alignment of uplink element carriers belonging to the single band to the terminal,
And a time alignment controller that does not support time alignment for uplink element carriers belonging to the single band for the terminal. 17. The method of claim 16,
If the second information field is included in the band combination parameter information, for every single band in the combination, time alignment of uplink element carriers belonging to each single band is supported,
Otherwise, for all single bands in the combination, the time alignment controller does not support time alignment of uplink element carriers belonging to each single band. 17. The method of claim 16,
The second information field is a bit string that maps each bit and a single band in a 1: 1 manner,
If the value of a specific bit is 1, time alignment of uplink element carriers belonging to a single band mapped to the specific bit is supported,
0, the time alignment controller does not support time alignment of uplink element carriers belonging to a single band mapped to the specific bit. 20. The method of claim 19,
And the length of the bit string is equal to the maximum number of bands that the terminal can simultaneously support.

Images